package eu.siacs.conversations.xmpp.jingle; import android.util.Log; import com.google.common.collect.ImmutableList; import com.google.common.collect.ImmutableMap; import org.webrtc.IceCandidate; import java.util.ArrayDeque; import java.util.Arrays; import java.util.Collection; import java.util.Collections; import java.util.List; import java.util.Map; import eu.siacs.conversations.Config; import eu.siacs.conversations.xml.Element; import eu.siacs.conversations.xml.Namespace; import eu.siacs.conversations.xmpp.jingle.stanzas.Group; import eu.siacs.conversations.xmpp.jingle.stanzas.IceUdpTransportInfo; import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket; import eu.siacs.conversations.xmpp.stanzas.MessagePacket; import rocks.xmpp.addr.Jid; public class JingleRtpConnection extends AbstractJingleConnection implements WebRTCWrapper.EventCallback { private static final Map> VALID_TRANSITIONS; static { final ImmutableMap.Builder> transitionBuilder = new ImmutableMap.Builder<>(); transitionBuilder.put(State.NULL, ImmutableList.of(State.PROPOSED, State.SESSION_INITIALIZED)); transitionBuilder.put(State.PROPOSED, ImmutableList.of(State.ACCEPTED, State.PROCEED)); transitionBuilder.put(State.PROCEED, ImmutableList.of(State.SESSION_INITIALIZED)); transitionBuilder.put(State.SESSION_INITIALIZED, ImmutableList.of(State.SESSION_ACCEPTED)); VALID_TRANSITIONS = transitionBuilder.build(); } private final WebRTCWrapper webRTCWrapper = new WebRTCWrapper(this); private final ArrayDeque pendingIceCandidates = new ArrayDeque<>(); private State state = State.NULL; private RtpContentMap initiatorRtpContentMap; private RtpContentMap responderRtpContentMap; public JingleRtpConnection(JingleConnectionManager jingleConnectionManager, Id id, Jid initiator) { super(jingleConnectionManager, id, initiator); } @Override void deliverPacket(final JinglePacket jinglePacket) { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": packet delivered to JingleRtpConnection"); switch (jinglePacket.getAction()) { case SESSION_INITIATE: receiveSessionInitiate(jinglePacket); break; case TRANSPORT_INFO: receiveTransportInfo(jinglePacket); break; case SESSION_ACCEPT: receiveSessionAccept(jinglePacket); break; default: Log.d(Config.LOGTAG, String.format("%s: received unhandled jingle action %s", id.account.getJid().asBareJid(), jinglePacket.getAction())); break; } } private void receiveTransportInfo(final JinglePacket jinglePacket) { if (isInState(State.SESSION_INITIALIZED, State.SESSION_ACCEPTED)) { final RtpContentMap contentMap; try { contentMap = RtpContentMap.of(jinglePacket); } catch (IllegalArgumentException | NullPointerException e) { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e); return; } final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap; final Group originalGroup = rtpContentMap != null ? rtpContentMap.group : null; final List identificationTags = originalGroup == null ? Collections.emptyList() : originalGroup.getIdentificationTags(); if (identificationTags.size() == 0) { Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no identification tags found in initial offer. we won't be able to calculate mLineIndices"); } for (final Map.Entry content : contentMap.contents.entrySet()) { final String ufrag = content.getValue().transport.getAttribute("ufrag"); for (final IceUdpTransportInfo.Candidate candidate : content.getValue().transport.getCandidates()) { final String sdp = candidate.toSdpAttribute(ufrag); final String sdpMid = content.getKey(); final int mLineIndex = identificationTags.indexOf(sdpMid); final IceCandidate iceCandidate = new IceCandidate(sdpMid, mLineIndex, sdp); Log.d(Config.LOGTAG, "received candidate: " + iceCandidate); if (isInState(State.SESSION_ACCEPTED)) { this.webRTCWrapper.addIceCandidate(iceCandidate); } else { this.pendingIceCandidates.push(iceCandidate); } } } } else { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received transport info while in state=" + this.state); } } private void receiveSessionInitiate(final JinglePacket jinglePacket) { if (isInitiator()) { Log.d(Config.LOGTAG, String.format("%s: received session-initiate even though we were initiating", id.account.getJid().asBareJid())); //TODO respond with out-of-order return; } final RtpContentMap contentMap; try { contentMap = RtpContentMap.of(jinglePacket); contentMap.requireContentDescriptions(); } catch (IllegalArgumentException | IllegalStateException | NullPointerException e) { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e); return; } Log.d(Config.LOGTAG, "processing session-init with " + contentMap.contents.size() + " contents"); final State oldState = this.state; if (transition(State.SESSION_INITIALIZED)) { this.initiatorRtpContentMap = contentMap; if (oldState == State.PROCEED) { Log.d(Config.LOGTAG, "automatically accepting"); sendSessionAccept(); } else { Log.d(Config.LOGTAG, "start ringing"); //TODO start ringing } } else { Log.d(Config.LOGTAG, String.format("%s: received session-initiate while in state %s", id.account.getJid().asBareJid(), state)); } } private void receiveSessionAccept(final JinglePacket jinglePacket) { if (!isInitiator()) { Log.d(Config.LOGTAG, String.format("%s: received session-accept even though we were responding", id.account.getJid().asBareJid())); //TODO respond with out-of-order return; } final RtpContentMap contentMap; try { contentMap = RtpContentMap.of(jinglePacket); contentMap.requireContentDescriptions(); } catch (IllegalArgumentException | IllegalStateException | NullPointerException e) { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e); return; } Log.d(Config.LOGTAG, "processing session-accept with " + contentMap.contents.size() + " contents"); if (transition(State.SESSION_ACCEPTED)) { receiveSessionAccept(contentMap); } else { Log.d(Config.LOGTAG, String.format("%s: received session-accept while in state %s", id.account.getJid().asBareJid(), state)); //TODO out-of-order } } private void receiveSessionAccept(final RtpContentMap contentMap) { this.responderRtpContentMap = contentMap; org.webrtc.SessionDescription answer = new org.webrtc.SessionDescription( org.webrtc.SessionDescription.Type.ANSWER, SessionDescription.of(contentMap).toString() ); try { this.webRTCWrapper.setRemoteDescription(answer).get(); } catch (Exception e) { Log.d(Config.LOGTAG, "unable to receive session accept", e); } } private void sendSessionAccept() { final RtpContentMap rtpContentMap = this.initiatorRtpContentMap; if (rtpContentMap == null) { throw new IllegalStateException("initiator RTP Content Map has not been set"); } setupWebRTC(); final org.webrtc.SessionDescription offer = new org.webrtc.SessionDescription( org.webrtc.SessionDescription.Type.OFFER, SessionDescription.of(rtpContentMap).toString() ); try { this.webRTCWrapper.setRemoteDescription(offer).get(); org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createAnswer().get(); final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description); final RtpContentMap respondingRtpContentMap = RtpContentMap.of(sessionDescription); sendSessionAccept(respondingRtpContentMap); this.webRTCWrapper.setLocalDescription(webRTCSessionDescription); } catch (Exception e) { Log.d(Config.LOGTAG, "unable to send session accept", e); } } private void sendSessionAccept(final RtpContentMap rtpContentMap) { this.responderRtpContentMap = rtpContentMap; this.transitionOrThrow(State.SESSION_ACCEPTED); final JinglePacket sessionAccept = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_ACCEPT, id.sessionId); Log.d(Config.LOGTAG, sessionAccept.toString()); send(sessionAccept); } void deliveryMessage(final Jid from, final Element message) { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": delivered message to JingleRtpConnection " + message); switch (message.getName()) { case "propose": receivePropose(from, message); break; case "proceed": receiveProceed(from, message); default: break; } } private void receivePropose(final Jid from, final Element propose) { final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid()); //TODO we can use initiator logic here if (originatedFromMyself) { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": saw proposal from mysql. ignoring"); } else if (transition(State.PROPOSED)) { //TODO start ringing or something pickUpCall(); } else { Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring session proposal because already in " + state); } } private void receiveProceed(final Jid from, final Element proceed) { if (from.equals(id.with)) { if (isInitiator()) { if (transition(State.PROCEED)) { this.sendSessionInitiate(); } else { Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because already in %s", id.account.getJid().asBareJid(), this.state)); } } else { Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because we were not initializing", id.account.getJid().asBareJid())); } } else { Log.d(Config.LOGTAG, String.format("%s: ignoring proceed from %s. was expected from %s", id.account.getJid().asBareJid(), from, id.with)); } } private void sendSessionInitiate() { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": prepare session-initiate"); setupWebRTC(); try { org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createOffer().get(); final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description); Log.d(Config.LOGTAG, "description: " + webRTCSessionDescription.description); final RtpContentMap rtpContentMap = RtpContentMap.of(sessionDescription); sendSessionInitiate(rtpContentMap); this.webRTCWrapper.setLocalDescription(webRTCSessionDescription).get(); } catch (Exception e) { Log.d(Config.LOGTAG, "unable to sendSessionInitiate", e); } } private void sendSessionInitiate(RtpContentMap rtpContentMap) { this.initiatorRtpContentMap = rtpContentMap; this.transitionOrThrow(State.SESSION_INITIALIZED); final JinglePacket sessionInitiate = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_INITIATE, id.sessionId); Log.d(Config.LOGTAG, sessionInitiate.toString()); send(sessionInitiate); } private void sendTransportInfo(final String contentName, IceUdpTransportInfo.Candidate candidate) { final RtpContentMap transportInfo; try { final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap; transportInfo = rtpContentMap.transportInfo(contentName, candidate); } catch (Exception e) { Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to prepare transport-info from candidate for content=" + contentName); return; } final JinglePacket jinglePacket = transportInfo.toJinglePacket(JinglePacket.Action.TRANSPORT_INFO, id.sessionId); Log.d(Config.LOGTAG, jinglePacket.toString()); send(jinglePacket); } private void send(final JinglePacket jinglePacket) { jinglePacket.setTo(id.with); //TODO track errors xmppConnectionService.sendIqPacket(id.account, jinglePacket, null); } public void pickUpCall() { switch (this.state) { case PROPOSED: pickupCallFromProposed(); break; case SESSION_INITIALIZED: pickupCallFromSessionInitialized(); break; default: throw new IllegalStateException("Can not pick up call from " + this.state); } } private void setupWebRTC() { this.webRTCWrapper.setup(this.xmppConnectionService); this.webRTCWrapper.initializePeerConnection(); } private void pickupCallFromProposed() { transitionOrThrow(State.PROCEED); final MessagePacket messagePacket = new MessagePacket(); messagePacket.setTo(id.with); //Note that Movim needs 'accept', correct is 'proceed' https://github.com/movim/movim/issues/916 messagePacket.addChild("proceed", Namespace.JINGLE_MESSAGE).setAttribute("id", id.sessionId); Log.d(Config.LOGTAG, messagePacket.toString()); xmppConnectionService.sendMessagePacket(id.account, messagePacket); } private void pickupCallFromSessionInitialized() { } private synchronized boolean isInState(State... state) { return Arrays.asList(state).contains(this.state); } private synchronized boolean transition(final State target) { final Collection validTransitions = VALID_TRANSITIONS.get(this.state); if (validTransitions != null && validTransitions.contains(target)) { this.state = target; Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into " + target); return true; } else { return false; } } public void transitionOrThrow(final State target) { if (!transition(target)) { throw new IllegalStateException(String.format("Unable to transition from %s to %s", this.state, target)); } } @Override public void onIceCandidate(final IceCandidate iceCandidate) { final IceUdpTransportInfo.Candidate candidate = IceUdpTransportInfo.Candidate.fromSdpAttribute(iceCandidate.sdp); Log.d(Config.LOGTAG, "sending candidate: " + iceCandidate.toString()); sendTransportInfo(iceCandidate.sdpMid, candidate); } }